/*
 * Copyright (C) 2023. Uber Technologies
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.uber.rib.workers.util

import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.flow.update

class StateStream<T : Any>(default: T) {
  private val _stateFlow = MutableStateFlow(default)
  private val stateFlow = _stateFlow.asStateFlow()

  fun dispatch(viewModel: T) = _stateFlow.update { viewModel }

  fun observe() = stateFlow

  fun current() = stateFlow.value
}
